What about the social security owed by the original unit after resignation?

Legal analysis: According to Chinese laws, it is illegal for a company not to buy social security, and it needs to be paid back.

Legal basis:

Article 8 An employing unit shall, within 30 days from the date of employment, register social insurance for its employees and declare and pay social insurance premiums. If the social insurance has not been registered, the social insurance agency shall verify the social insurance premium it should pay. If the employer fails to declare the amount of social insurance premiums payable according to the regulations, the social insurance agency shall temporarily determine the amount payable according to 1 10% of the amount paid by the unit last month; If there is no payment amount last month, the social insurance agency shall temporarily determine the amount of payment according to the operating conditions of the unit, the number of employees and the average salary of employees in the local last year. After the employer completes the declaration procedures, the social insurance agency shall settle the accounts in accordance with the provisions.

Article 16 If the employing unit is under any of the following circumstances, the social insurance agency shall issue a notice of unpaid social insurance premiums within five working days from the date of finding out the facts of unpaid social insurance premiums, order the employing unit to pay them back within five working days after receiving the notice, and inform that if it fails to pay them within the time limit, it shall be handled in accordance with the provisions of Articles 63 and 86 of the Social Insurance Law:

(a) failing to declare and pay social insurance premiums in accordance with the provisions;

(2) Failing to pay social insurance premiums in full and on time after the declaration;

(three) due to concealment, omission of the number of employees, payment base and other matters and pay less social insurance premiums.